Ice chipper plate



2 Sheets-Sheet 1 T. E. FISCHER ICE CHIPPER PLATE Filed Sept. 8, 1931Sept. 4, 1934.

P 1934. T. E. FISCHER I 1,972,735

ICE CHIPPER PLATE Filed Sept. 8. 1951 2 Sheetz-Sheet 2 Patented Sept. 4,1934 UNKITE'D STA 'rES PATE m OFFICE 1.978.785 on omrran mars TheodoreE. Fischer, Troy, Ohio, claim: to The Kitchen Aid Manufacturing Company,Troy,

Ohio, a corporation of Ohio Application September a. 1031, Serial No.sauna Claims.

This invention relates to food handling apparatus and more particularlyto a chipper plate particularly adapted to chip ice.

It is an object of the invention to provide a chipper plate suitable forchipping substances such as ice which is simple in construction, strongand rugged, easy to sharpen initially and easy to keep in a sharpcondition.

-It is a further object to provide a chipper m plate in which thecutting-teeth or knives are formed integrally with the body of the plateand in such' a manner as to be easily available for resharpening. I

It is a further object to provide a novel method 15 of making such achipper plate.

Other objects and advantages will be apparent from a study of thedetailed description, the accompanying drawings, and the appendedclaims.

In the drawings- Figs. 1 to 5 are plan views showing in sequence theseveral operations of making a chipper plate according to the presentinvention, Fig. 5 showing the finished plate;

Fig. 6 is a side elevatlonal view of the finished plate with the shaftattached:

Fign'l is a view partially in section and partially in elevation oftheichipper plate in operative position in a hopper; and

Fig. 8 is an elevational view of the opened position;

Starting with a sheet metal plate, preferably made of steel and having athickness suitably chosen to provide suflicient strength without un- 5duly increasing the weight of the plate, the first operation consists instamping-out a substantially circular plate 10 from the stock havingformed thereon a plurality of radially extending projections 11. -Theseprojections are '01 equal width and are symmetrically spaced around theperiphery of the plate. drawings four such projections are shown but anyconvenient number may be chosen. At the same time that the plate isstamped out from the stock, a hole 12, substantially rectangular inoutline, is likewise formed at thecenter of the plate.

The second operation consists in forming a peripheral flange 13 bybending over the rim of the plate at right angles to the face thereof.The flange is shallow intermediate the projections 11, which now extendat right angles to the face of the plate and project substantially hop rin above the plane of the flange.

be varied as desired. the first tooth being located relatively close tothe center hole, the last being adjacent the peripheral flange, thewhole set of teeth extending radially and being in line with the spacebetween projections 11. The other groups of teeth 16, 1'1 and 1a arelikewise formed, either in a single operation with the stamping out ofthe group 15 or in successive operations, these groups as showneachhaving four cutting teeth, and the teeth commencing at increasingdistances from the center so that the teeth are staggered around theplate. All the groups of teeth are so formed with respect to theprojections 11 that each group is aligned with the space between twoadjacent projections, or in radial non-alignment with theproiectlonsthemselves.

The next operation consists in pressing up the ends of the teeth 19 asshown in Fig. 4. All of the teeth are so pressed that their extremitieslie in a plane which is intermediate that of the flange 13 and of theends of the projections 11. In this way,.the ends of the teeth areexposed above the level of flange 13 and so are made easily available tothe action of a sharpening tool, such as a file, while at the same timethey are protected by not extending above projections 11'.

The next operation consists in sharpening the ends of the teeth. This isconveniently done by placing the plate in a lathe and rotating itagainst a cutting tool which is advanced against the outwardlyprojecting teeth. As shown, the cutting tool will form a beveled edge19' on each tooth,

the face 19' being substantially level with that of As illustrated inthe the face of the plate. This provides a sharp cutting edge at theforward part of each tooth and likewise provides a fiat surface whichmay be easily sharpened in several ways after the device has been inuse, for instance, by the use of a file.

As pointed out above, the teeth extend above flange 13 and thus thesharpening process is rendered very simple. At the same time, the'projections 11, standing above the teeth, protect the same againstaccidental impacts which 108 would dull and bend the teeth.

A shaft 20 is fastened to the plate by means of bolting it or rivetingit to the plate through the central hole, or in any other suitablemanner. This forms a driving connection for'the;

plate. A sleeve 22 is provided on the inner face While the devicedescribed above is adapted to be used with 'any co nvenient mechanism,it will be found to give very satisfactory results when:

used in connection with the hopper structure to be described. Thishopper comprises a housing 30, substantially cylindrical in shape andprovided at its lower portion with a discharge opening 31. A hub portion32 is formed in the wall of the housing integrally therewith, andprojecting from the hub is a tapered portion 33, adapted to form thesupport for the entire structure when it is received in an oppositelytapered member in a support. The device as illustrated is adapted to beused as an attachment of a power driven food handling machine, such as amixing machine, the casing of which is provided in a well known mannerwith an attachment coupling sleeve within which the tapered portion 33is adapted to be inserted and held in place by means of a pin mounted inthe mixing machine adapted to engage a recess 36 in the tapered portion33.

The hub 32 forms a bearing for rotatably supporting the shaft 20 of thechipper plate, the end portion 21 extending beyond the hub so as to beconveniently driven by a corresponding socket in the mixing machine. Asthis is an entirely conventional structure, the mixing machine with itsattachment coupling is not illustrated herewith as it forms no part ofthe present invention, and while the present device has been describedas an attachment for such a power driven machine the invention is not solimited and the shaft 20 may be driven from any suitable source of poweror by means of a manually operable crank.

Projections 3'7 and 38 are formed integrally with the housing and areprovided with vertically aligned holes adapted to serve as a mountingfor the removable cover and hopper portion. The upper projection 38 isformed with an outwardly extending cam surface 39 over a portion of thesurface.

The cover and hopper portion comprises a casing 40 from which, as in thecase of the housing 30, may be conveniently formed as a die casting, themetal used preferably being an aluminum composition to obtain lightnesscoupled with strength. Lugs 41 and 42 are provided at one side of thecover and pins are fitted therein adapted to seat within the holesformed in the projections 37 and 38 to pivotally mount the cover on thehousing 30. A shoulder 42 is formed on the cover portion and is adaptedto cooperate with the extended cam surface 39 to prevent removal of thecover from the housing until after the hopper has been swung throughapproximately 180' .on its pivots to the open position shown in Fig. 8when the shoulder 42 will clear the cam and permit the hopper to belifted vertically away from the housing. Such a construction providesfor ready removal of the hopper when it is desired to clean the devicebut it also serves as a protection to the operator since the cover cannot be removed during the normal use of the device or in case the covershould become accidentally unlatched and swung through a small arc, itwould still protect the operator to a certain extent from the action ofthe chipping plate. Projecting lug 45 is formed on the housing and isadapted to fit closely in a recess 46 in the cover. A latching arm 47 isbolted to the cover and latches over a pin 48 carried in the A food orice admission hopper 50 is formed -in the cover, the hopper having anelongated top opening as indicated at 51 which extends acrosssubstantially the entire upper portion thereof so that foodstuffs may bereadily dropped into this hopper. The bottom wall of the hopper iscurved in the arc of a circle as indicated at 52. Upstanding projections53 formed on the wall of the hopper provide a mounting for a feed plate54 which is pivotally supported therein by means of pins 55. The feedplate is so shaped as to correspond with the internal surface of thehopper passage so that when rotated on its pivots it sweeps through theentire passage and serves to advance any material therein towards thebottom of the passage and into contact with the cutting elements. Ahandle 56 is provided for operating the feed plate, shown as integraltherewith, and is so arranged that the food may be advanced through thetrough-like passage to the treating mechanism without the necessity oftouching the same with the hands or placing the 'hands nearthe cuttingmechanism. In order to insure that the operator will use the feed platethe same is so constructed that it must be manually moved and held inposition out of the hopper so that it tends at all times to return tothe position shown wherein its face is practically flush with that ofthe hopper. Such action is obtained by providing a lateral extension 57on the handle so that the weight of the same, being supported frompivots 55, normally tends to advance the plate to its extreme innerposition. A lug 58 is formed upon the face of the handle and is adaptedto engage a stop member 59 formed integrally with the cover to limit thedownward movement of the handle to the position in which the feed plateis in its lowermost position where it is flush with the inner face ofthe hopper.

A second passage for the admission of material to be treated is providedas indicated at 60. This passage is substantially smaller in crosssection than the hopperv 50 and is located to one side of the hopper 50and formed as a tubular extension of the cover member. A strengtheningrib 61 is provided between the walls of the two passages. A portion 62of the wall defining the lower passage is circular in crosssection whilethe remainder is defined by two substantially plane intersectingsurfaces 63 and 64. The wall portion 63 isso inclined and intersects thewall portion 64 at such an angle that when the article to be treated isintroduced ,into the passage and advanced against the cutting mechanismby the operator through the action of other articles in back thereof, itis urged by the rotating cutting mechanism against wall 63 and thetendency is for the article to slide against this wall into the apex ofthe two converging walls which in effect forms a pocket for the properretention of the article while being treated. The dimensions of thepassage 60 are so chosen that it'is impossible for the hand of an adultoperator to extend through the passage into contact with the cuttingmechanism, but the material is advanced by placing a series of articlesin the passage or if desired a manual pusher block adapted to fit withinthe passage may be used.

In using the hopper to chip ice, it will gen- 150 erally be found moresatisfactory to use the hopper and to raise the feed plate out of thehopper and to place the ice, either in cubes or other form, into thehopper passage. The feed plate is then advanced through the action of Athe handle into contact with the ice to press it forward to be actedupon by the rotating chipper plate. The spacing of the several. knivesof the chipper plate is such that for every revolution of the platepractically the entire section opposite the end of the hopper 50istraversed by a cutting knife so that the ice will be uniformly chippedand so that there will be no portion which is not acted upon by acutting knife. The flanges 11 are adapted to abut against the face ofthe hopper and consequently serve to space the cutting knives from thehopper a suitable distance. The thrust produced on the chipper plate istaken up by means of the collar 22 acting against the surface of hub 32The present device therefore provides a chip per plate which is ofintegral construction, inexpensive, very rugged, and simple tomanufacture, being effective in use to thoroughly reduce material tosmall chips uniformly and without waste. After a period of use, when thecutting knives or teeth have become dulled it is a simple operation toresharpen them which operation can be easily performed by the user.

While the form of apparatus herein described constitutes a preferredembodiment of the invention, it is to be understood that the inventionis not limited to this precise form of apparatus, and that changes maybe made therein without departing from the scope of the invention whichis defined in the appended claims.

CERTIFICATE Patent No. 1,972,735.

What is claimed is: 1. A chipping device formed of a metal plat having abent-over peripheral flange, symmetrically arranged upstandingprojections on the flange, a group of cutting teeth struck up from theplate and located in radial non-alignment with said projections, saidteeth extending upwardly a distance intermediate said flange and saidprojections.

'2. A chipping device comprising a metal plate having a peripheralflange bent over toward the operative face of the plate, symmetricallyarranged upstanding projections on the flange, groups of cutting teethformed in the plate and bent upwardly a distance intermediate saidflangeand said projections, said groups being aligned with the spaces betweenadjacent projections, and sharpened cutting edges on said teeth.

3. As an article of manufacture, a chipper plate having a peripheralstrengthening flange, a plurality of spaced projections on said flange;a plurality of cutting teeth formed in said plate and positioned betweensaid projections, the ends of said teeth extending intermediate the saidflange and said projections.

4. A chipper plate of the character described comprising a circula1jplate having teeth extending upwardly therefrom, a strengthening flangeextending in the same direction as the teeth but to a lesser degree thansaid teeth, and a spacing projection extending beyond said flange toprotect said teeth while exposing them to the action of a suitablesharpening tool.

THEODORE E. FISCHER.

0F CORRECTION.

September'4, 1934.

THEODORE E. FISCHER.

It is hereby certified that the name of the assignee inthe abovenumbered patent was erroneously written-and printed as "The Kitchen AidManufacturing Company." whereas said name should have been written andprinted as The KitchenAid Manufacturing Company, as shown by the recordsof the office; ,and that the said Letters Patent should be read withthis correction therein thatthe same may conform to the record of thecase in the Patent Office.

Signed and sealed this 16th day of October, A. D. 1934.

Leslie Frazer Acting Commissioner of Patents.

erally be found more satisfactory to use the hopper and to raise thefeed plate out of the hopper and to place the ice, either in cubes orother form, into the hopper passage. The feed plate is then advancedthrough the action of A the handle into contact with the ice to press itforward to be acted upon by the rotating chipper plate. The spacing ofthe several. knives of the chipper plate is such that for everyrevolution of the plate practically the entire section opposite the endof the hopper 50 istraversed by a cutting knife so that the ice will beuniformly chipped and so that there will be no portion which is notacted upon by a cutting knife. The flanges 11 are adapted to abutagainst the face of the hopper and consequently serve to space thecutting knives from the hopper a suitable distance. The thrust producedon the chipper plate is taken up by means of the collar 22 actingagainst the surface of hub 32 The present device therefore provides achip per plate which is of integral construction, inexpensive, veryrugged, and simple to manufacture, being effective in use to thoroughlyreduce material to small chips uniformly and without waste. After aperiod of use, when the cutting knives or teeth have become dulled it isa simple operation to resharpen them which operation can be easilyperformed by the user.

While the form of apparatus herein described constitutes a preferredembodiment of the invention, it is to be understood that the inventionis not limited to this precise form of apparatus, and that changes maybe made therein without departing from the scope of the invention whichis defined in the appended claims.

CERTIFICATE Patent No. 1,972,735.

What is claimed is: 1. A chipping device formed of a metal plat having abent-over peripheral flange, symmetrically arranged upstandingprojections on the flange, a group of cutting teeth struck up from theplate and located in radial non-alignment with said projections, saidteeth extending upwardly a distance intermediate said flange and saidprojections.

'2. A chipping device comprising a metal plate having a peripheralflange bent over toward the operative face of the plate, symmetricallyarranged upstanding projections on the flange, groups of cutting teethformed in the plate and bent upwardly a distance intermediate saidflangeand said projections, said groups being aligned with the spaces betweenadjacent projections, and sharpened cutting edges on said teeth.

3. As an article of manufacture, a chipper plate having a peripheralstrengthening flange, a plurality of spaced projections on said flange;a plurality of cutting teeth formed in said plate and positioned betweensaid projections, the ends of said teeth extending intermediate the saidflange and said projections.

4. A chipper plate of the character described comprising a circula1jplate having teeth extending upwardly therefrom, a strengthening flangeextending in the same direction as the teeth but to a lesser degree thansaid teeth, and a spacing projection extending beyond said flange toprotect said teeth while exposing them to the action of a suitablesharpening tool.

THEODORE E. FISCHER.

0F CORRECTION.

September'4, 1934.

THEODORE E. FISCHER.

It is hereby certified that the name of the assignee inthe abovenumbered patent was erroneously written-and printed as "The Kitchen AidManufacturing Company." whereas said name should have been written andprinted as The KitchenAid Manufacturing Company, as shown by the recordsof the office; ,and that the said Letters Patent should be read withthis correction therein thatthe same may conform to the record of thecase in the Patent Office.

Signed and sealed this 16th day of October, A. D. 1934.

Leslie Frazer Acting Commissioner of Patents.

